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uid 395

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This species has a counterpart in the theoretical library

Transitions

Frequency
[wavenumbers]
Wavelength
[microns]
Integrated cross-section
[km/mol]
3058 3.27 132.4
1941 5.151 0.8428
1925 5.196 1.686
1892 5.284 1.686
1828 5.469 0.8428
1809 5.527 1.686
1799 5.559 2.528
1762 5.674 0.8428
1756 5.694 1.686
1692 5.908 0.8428
1673 5.977 0.8428
1616 6.186 3.371
1589 6.292 5.057
1582 6.321 0.8428
1561 6.405 3.371
1529 6.54 5.9
1488 6.72 15.05
1474 6.786 7.826
1453 6.883 20.47
1430 6.995 51.17
1412 7.083 1.686
1392 7.185 2.528
1373 7.282 2.528
1354 7.387 0.8428
1326 7.543 3.371
1290 7.754 4.214
1225 8.164 0.8428
1213 8.247 2.528
1192 8.387 5.057
1175 8.513 4.214
1140 8.775 9.03
1131 8.839 0.8428
1072 9.333 1.686
1047 9.55 4.214
1029 9.72 5.9
1014 9.862 0.8428
978.4 10.22 0.8428
936.4 10.68 1.686
857.6 11.66 2.528
831.7 12.02 0.8428
826.1 12.11 4.214
815.5 12.26 84.28
805.7 12.41 0.8428
791.9 12.63 5.9
769.2 13 57.19
750.1 13.33 7.826
738.7 13.54 30.1
706.8 14.15 0.8428
693.5 14.42 3.371
638.4 15.66 5.9
628.1 15.92 1.686
604.4 16.55 0.8428
553 18.08 5.057
547 18.28 5.057
508.3 19.67 12.04

Laboratory Spectrum

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This spectrum was measured using the matrix isolation technique. Samples are prepared by co-deposition of the PAH in the gaseous state with an overabundance of argon onto a cold CsI window suspended in a high vacuum chamber (p ~ 10-8 mtorr). The CsI window temperature is held between 10 and 15 K for the duration of the experiment. The infrared spectrum of the cold CsI window is recorded prior to (I0) and immediately after sample deposition (In). The absorbance spectrum for a neutral, matrix isolated PAH is log(In/I0).

By irradiating this matrix with ultraviolet radiation from a microwave powered hydrogen discharge lamp produces ionized PAHs. The infrared spectrum is again measured (Ii), now having absorption bands due to both the neutral and ionized PAH. This absorbance spectrum (log (I/Ii)) is compared with that of the neutral PAH. Most of the new bands produced by ultraviolet irradiation are due to the ionized form of the PAH. See the provided reference for the specific details regarding the data presented here. In some cases a few bands near 1600 cm-1 may be due to H2O.

Note(s):


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84 species present in version 3.10 of the experimental database (Apr 13, 2023)